Phonograph.



0. B. COLE.

PHONOGRAPH.

APPLICATION FILED JULY 16, 1914.

!L:l29,"792. I PatenteaFeb.2s,1915.

. vTo all whom 'it may concern I OTTO B. COLE,

OF BOSTON, MASSACHUSETTS, ASSIG'NOR T0 ARION MANUFACTURING' COMPANY, OFPORTLAND, MAINE, A CORPORATION OF MAINE.

PHONOGBAPH.

Specication of Letters Patent.

' Patented Feb. 23, 1915.

Application led July 16, 1914. Serial No. 851,386.

Be it known that I, OTTO B. COLE, zen of the United States, residing atBoston,

vcounty of Suifolk, Commonwealth of Massachusetts, have invented certainnew and useful Improvements in Phonographs, of which the following is aspecification.

This invention relates to phonographs of the class known as hornlessphonographs. Such phonographs are not in fact hornless but have the hornor sound amplifier inclosed in a suitable cabinet or casing within themachine. The objectionable scratching noise produced by roughnesses inthe record groove and the harsh metallic effects given out by the movingparts of the machine are familiar characteristics of phonographs of thisclass, and in fact of nearly all phonographs, and tend to largelydetract from the quality and timbre of the original tone. To the endtherefore of completely reproducing the quality and sweetness of theoriginal tone without the presence of these extraneous mechanicalvibrations, lI have devised my present invention. In it the cabinet isopen on one side and' a sound board is located vertically within thecabinet and parallel to the open side. The sound waves are deliveredfrom the reproducer directly against this sound board by a soundconductor having an inwardly directed end entering the cabinet. Thesound board has flaring partitions extending outwardly to the lateraledges of the open side of the cabinet and these partitions with thesounding board provide a sound amplifier whereby to direct thesoundwaves outwardly with increased volume and fidelity of tone. The volumeof the reproduced sound is regulated and modulated by a sliding damperarranged in controlling relation within the sound conducting tube. Meansare also provided for positively locking the swiveled reproducer armwhen said arm is swung away from the record out toward the side of thecabinet. l

These and various other features as well as the construction andprinciple of my invention will be more fully disclosed and discussed inthe'specification thatfollows.

In the drawings forming a part of that specification I have shown asillustrative embodiments two forms of phonographs which have provensatisfactory in use.

Throughout specification and drawings a citi-- like reference numeralsare employed -to indicate corresponding parts, and in these drawings:

Figure 1 is an elevation of a phonograph in accordance with myinvention, illustrat- 1ng in full and dotted linesl the two positionsof` the lock for the reproducer arm, Fig. 2 is a detail of the lockdetached, Fig. 3 is a plan section of one form of phonograph taken onthe line 3 3, of Fig. 4, Fig. 4 is a. vertical section on the line 4-4,of Fig. 3. Fig. 5 is a plan section of a modified form of phonographtaken on the line 5-, of Fig. 6. Fig. 6 is a vertical section on theline 6-6 of Fig. 5, and Fig. 7 is a detail of the tone modulatingdamper.

I have indicated at 1 the cabinet or casing of a phonograph of the socalled hornless type. The cabinet is divided interiorly into twocompartments, 2 and 3, respectively, by

.a sounding board 4. vWithin the compartment 2 is located the usualmotor (not shown) operated by an exposed hand crank 5. Within thecompartment 3 is located the delivery end 6 of a sound conductor leadingfrom the reproducer 12 to the sound board 4. The delivery end 6 of thesound conductor is formed as a downwardly and inwardly curved tubelocated within the cabinet and having an inwardly iiared mouthdelivering directly against the sound board 4. The upper restricted endof the tube is substantially vertically disposed. This end is screwthreaded internally as indicated to receive the external screw threadson one end ofa flanged coupling member 7. The opposite end of thecoupling member 7 receives and provides a swiveled mount for the lowerend of an elbow 8, whereby the elbow may swing laterally. The oppositeend of the elbow has a bead over which is slipped one end of a hollowreproducer arm 9. The arm 9 is loosely held at this end by a collar 10and a set screw 11 which permits the necesend at 16 to the cabinet 1 andforked at its other end'at 17 to engage the reproducer arm. The locknormally lies in the full line position shown in Fig. 1. When it isdesired to lock the reproducerarm so that said' arm will .not swing backover the record, thelock 15 is swung up vertically to the dotted lineposition shown in Fig. 1 to bring its upper forked end 17 under thereproducer armso that the forks 17 engage said arm-on either side. Thelocking member 15 will remain in its upright position, by

reason of the friction developed at the pivot 16, and can not-bereleased until the arm 9 is disengaged.

In order to modify the volume of sound passing through the elbow 8, Iprovide the tone modulator and intensifier shown in detail in Fig. 7.This device may conveniently consist of a damper or slide valve 18slidably guided in ways across the throat of the elbow 8. The damper 18is provided with a plurality of openings 19 of gradually decreasingdiameter whereby the volume of sound passing-through the member 8 maybewaried. In using themodulator it is essential\that\the@les 19 bepositively centered relatively to the throat. This is effected in thepresent invention by means of a spring pressed catch member 20 mountedfor locking engagement with any notch of a series of locking notches 21formed in one edge ofthe damper 18.l The tendency of the spring is toproject its catch in the path of the damper, so that when a notchismoved up opposite to the catch it will be engaged thereby topositively lock the damper in centered position.

The sound board 4 referred to hereinabove consists in Figs. 1 to 4inclusive of a vertically disposed wall 4a arranged within the cabinetparallel to .the open side 23 thereof. Extending diagonally from eachendof saidwall to the lateral edges of said open side is an outwardlyflaring partition 4b which with the wall 4a and the upwardly extendingwall 4c resting on said wall 4a defines an outwardly directed amplifier.The delivery end 6 of the sound conductor passes through a'n opening inthe wall 4. and delivers directly against the vertical sounding board4a. If desirednthe vertical wall 4a may carry a pyramidal brother-.gr-

wise shaped block 22 directly opposite the delivery end of the soundconductor to assist in diffusing the sound waves, although the soundboard is effective without this deflector piece. This arrangement of aninwardly delivering sound conductor in combination with a sound boardand an outwardly directing amplifier is extremely effective. Byrit, I amenabled to reproduce' the quality and resonance of the original tonewithout the .objectionable mechanical sounds usually liberated.

In the form of my invention4 shown. in Figs. 5 and 6, I have shown aslightly modified arrangement of tone clarifying apparatus. In thisembodiment, the coupling 7 is extended downward vertically and conf 22are connected. The sound vconductors 25 and 23 direct the sound waves inthree directions against a resonant sounding board 4 correspondingy infunction to the sounding board 4 but of necessarily different shape. Thesound board 4 may if desired be provided with three spreader blocks 26similar in function and shape to. the block 22 in Figs. 3 and 4. Thepurpose of the arrangement shown is the same as that of the arrangementin Figs. 3 and 4. A larger area over which the sound is diffused isprovided, however, in the form' shown in Figs. 5 and 6. It will beunderstood that the tone modulator 18 is intended to be used in the formshown in Figs. 45 and 6.

Various modifications in the form and construction of my device mayobviously be made, all without departing from the spirit of my inventionif within the limits of theY appended. claims.

What I therefore claim and desire to secure by Letters Patent is:

l. In a sound producing machine, the combination of a cabinet open onthree sides, sounding boards vertically disposed therein yductor-s 25,similar to the sound conductor and parallel to the open sides andflaring defleeting partitions extending fromv said sounding boards tothe edges of the cabinet and inwardly directing sound conductors havingtheir delivery mouths disposed in opposition to said sounding boards.

2. In a sound producing machine, the combination of a rectangularcabinet open on'tllree sides, sounding boards vertically disposedtherein and parallel to said open sides and flaring defiectingpartitions extending substantially diagonally from `said sounding boardsto the edges of the cabinet, and inwardly directing sound conductorshaving their delivery mouths disposed in opposition to said soundingboards.

` 3. In a sound producing machine, the combination of a cabinet open onone side, a sounding board vertically disposed therein and having aspreader surface for diffus- 'ed from said sound board combination of acabinet a at soundin board vertically disposed therein paralle to saidopen side and having a spreader surface for diffusing and disseminatingthe sound waves, a pair of flaring deiiecting partitions extendingdiagonally from said sounding board to the edges of the cabinet, and aninwardly directlng sound conductor having a delivery mouth disposed inopposition to the spreader surface of the sounding board.

5. In a sound producing machine, the combination of a cabinet, open onone side, a soundin board vertically disposed therein and parael to saidopen side, a pair of daring deiiecting partitions extending diagonallyfrom said sounding board to the edges of the cabinet and. with thesounding board dividing the cabinet into compartments, an inwardlydirecting sound conductor having a delivery mouth disposed in one ofsaid compartments in opposition to the sounding board and a motordisposed in an adjacent compartment.

6. In a sound producing machine, a substantially dat sound board, asound conductor directed toward said board and an oppositely directedamplifier extended from said sound board.

7. In a sound producing machine, a substantially dat vibratory soundboard, a sound conductor directed toward said board and an oppositelydirected ampliier extended from said sound board past said soundconductor.

8. In a sound producing machine, a cabinet, a substantially datvibratory sound board therein, a sound conductor having its delivery enddisposed in opposition to said sound board, and an oppositely directedamplii'ier including a pair of daring partitions extending from saidsound board to the open on one side,

edges of the cabinet.

9. In a sound producing machine, a cabinet, a vibratory sound boardtherein, an inwardly directed sound conductor having its delivery enddisposed in opposition to said sound board, and an outwardly directedampliiier including a pair of daring partitions extending diagonallyfrom said sound board to the edges of the cabinet.

10. In a sound producing machine, an open ended cabinet, a substantiallylat vibratory sound board therein, a sound conductor directed againstsaid sound board, and an oppositely directed amplifier extendto theinclosing walls of said open side of said cabinet.

11. In a sound producing machine, a Cabinet, a vibratory sound boardtherein, an inwardly directed sound conductor delivering against saidsound board, and an outwardly directed amplifier, includingsubstantially flat walls extended from said sound board diagonally tothe edges of said cabinet.

12. In a sound producing machine, a substantially'lat vibratory ing aconical spreader, a stationary sound conductor directed toward saidboard, and

an oppositely directed amplifier extendingfrom said sound board.

13. In a sound producing machine, in combination, a cabinet, asubstantially dat sounding board therein, a pair of flaring defiectingpartitions extending outwardly from said board, a member superimposedupon said sound board and extending outwardly toward the side of thecabinet, and a sound conductor delivering in opposition to said soundboard.

14. In a sound producing machine, in combination, a cabinet, a soundingboard therein, a pair of flaring deflecting partitions extendingdiagonally outwardly Jfrom said board, a member superimposed upon saidsound'board and extending outwardly and upwardly toward the side of thecabinet, and a sound conductor delivering in opposition to said soundboard.

15. In a sound producing machine, in combination, a cabinet, a soundboard vertically disposed therein, a pair of Haring deilectingpartitions extending diagonally from said sound board to the edges ofthe cabinet, and an inwardly directed sound conductor arranged inopposition to said sound board.

16. In a sound producing machine, in combination,.a rectangular cabinet,a fiat sounding board vertically disposed therein, a pair of flaringdeflecting partitions extending diagonally from said sound boar' of thecabinet, and an inwardly directed sound conductorarranged in oppositionyto said sound board.

17. Ina sound producing machine, in combination, a rectangular cabinetlopen on one side, a fiat sounding board vertically disposed thereinparallel to said open side, a pair of iaring deiecting partitionsextending diagonally from said sound board to each lateral edge of theopen side, and an i11- wardly directed sound conductor arranged inopposition to said sound board.

18. In a sound producing machine of the cabinetted horn type, thecombination of a substantially fiat vibratory resonator and a soundconductor arranged in opposition thereto and an amplifier` extendingtherefrom.

19. In a sound producing machine, a cabinet, and a built in hornstructure therein having a substantially fiat vibratory sound board atthe end thereof and an inwardly directed sound conductor opposedthereto.

20. In a sound producing machine, in com` bination, a cabinet, a builtin horn structure including a straight walled refiecting chamber havinga transverse -flat sound board at its inner end and an inwardly directedsound conductor within said chamber and having sound board carryd to theedges its delivery mild 'dpppsite to' said sound bard. I

21. 1n a-sound 'producing lfrmhilm a cabi-- duc'ng means locad above'said partition, a

subeamial'ly Haw boafrd 'within said www@

